HARD DISK DRIVE TO HARD DISK DRIVE CONTROLLER CONTROL SIGNALS CONTROLLER 34 PIN CONNECTOR Jl TO HARD DISK DRIVE 34 PIN CONNECTOR PI I----GROUND------------------------l 2----LOW CURRENT*------------------2 3----GROUND------------------------3 4----HEAD SEL 2*-------------------4 5----GROUND------------------------5 6----WR GATE*----------------------6 7----GROUND------------------------7 8----SEEK COMPLETE*----------------8 9----GROUND------------------------9 10---TRACK 00*---------------------10 II---GROUND------------------------11 12---WR FAULT*---------------------12 13---GROUND------------------------13 14---HEAD SEL 0*-------------------14 15---RESERVED----------------------15 16---RESERVED----------------------16 17---GROUND------------------------17 18---HEAD SEL 1*-------------------18 19---GROUND------------------------19 20---INDEX*------------------------20 21---GROUND------------------------21 22---READY*------------------------22 23---GROUND------------------------23 24---STEP*-------------------------24 25---GROUND------------------------25 26---DRIVE SEL 0*------------------26 27---GROUND------------------------27 28 28 29---GROUND------------------------29 30 30 31---GROUND------------------------31 32 32 33---GROUND------------------------33 34---DIR*--------------------------34 B-7